[Tumor of the mesosalpinx with unclear differentiation]
This paper describes female adnexal tumors of probable Wolffian origin (FATWO), detailing their variable histological patterns, generally benign behavior with rare malignant transformation, and immunohistochemical markers including pancytokeratin, CD10, vimentin, calretinin, and inhibin A.
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The paper reviews and describes female adnexal tumors of probable Wolffian origin (FATWO), rare tumors localized mainly in the broad ligament or mesosalpinx, which can show diverse histologic growth patterns (solid, tubular, cribriform, cystic) despite usually bland cellular morphology and low mitotic rates. It reports that FATWOs are generally benign but can rarely undergo malignant transformation, emphasizing the need for careful examination and surveillance, and it outlines differential diagnostic pitfalls including Sertoli-Leydig cell tumors, metastasized endometrioid carcinoma, and a FATWO-like variant of endometrioid fallopian tube carcinoma. Immunohistochemically, FATWOs express pancytokeratin, CD10, vimentin, calretinin, and inhibin A, with estrogen/progesterone receptor positivity in a minority and no detectable EMA. Relevance to endometriosis: the paper discusses endometrioid carcinoma as a key differential diagnosis (a tumor type often discussed in the endometriosis literature), though it does not explicitly discuss endometriosis or adenomyosis.
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- europepmc
- last seen: 2026-06-19T06:14:56.452680+00:00
- pubmed
- last seen: 2026-05-13T22:21:13.485820+00:00
- unpaywall
- last seen: 2026-05-14T19:30:52.867331+00:00
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